Insulting His Military Intelligence

(My parents have just returned from a trip. Everywhere they go, my dad tries to get a discount. He is relating a story on his recent discount for a hotel.)

Dad: “So, I asked the guy if they had a AAA discount, and he said no. Then I asked about AARP, and he said no again. Finally I asked, ‘Well, what do you do for retired military personnel!’ He found a discount then!”

Sister:“Dad, you were never in the military! So, you got the LLPOF discount.”

Dad: “What’s that?”

Sister: “Liar Liar Pants on Fire.”